1958 



THE BOTANY OF THE GUAYANA HIGHLAND PART III 



115 



Bunting 36802 (NY). Paratype : occasional on and around rocks in forest south- 

 east of Camp 3, elev. 900 m, Cerro de la Neblina, Jan 24, 195-4, Maguire, Wur- 

 dack, <£ Bunting 37364. 



The leaf -blades of M. longidens are only 12-17 X 7-9 mm and elliptic or 

 scarcely ovate-elliptic with broadly acute apices; the interior calyx lobes are 

 semi-circular. 



Macrocentrum maguirei Wurdack, sp. nov. 



M. anychioidi Gleason affinis sed foliis longioribus oblanceolatis, petalis an- 

 therisque minoribus, staminum appendice dorsali longiore. 



Herba exigua ad 15 cm alta superne ramosa caulibus cum internodiis glabris 

 subquadrangulatis nodis setosis setis robustis ca. 1 mm longis. Folia isomor- 

 phica ; petiolus 1-3 mm longus; lamina 7-15 X 1-5-4 mm. oblanceolata apice 

 anguste rotundata basi attenuata uninervia sparse (praecipue apicem versus) 

 ciliata ciliis ad 1.5 mm longis et 1-3 mm inter se distantibus, supra et subtus 

 primum sparse rubro-glandulosa supra demum glabrata. Flores solitarii 4-meri ; 

 pedicellus sub bracteolis ca. 5 mm longus. supra 0.5-0.7 mm ; bracteolae 0.9 X 0.2 

 mm. Hypanthium 1-1.3 X 1.7-2 mm. sparse rubr o-glan dulosum breviter 8- 

 alatum alis apice unisetosis seto ca. 1 mm longo. Calyx 0.3 mm coalitus, lobis 

 1.8 X 1 nun late semicircularibus paulo emarginatis. Petala 5.5 X 3 mm, 

 oblongo-obovata apice subtruncata glabra. Stamina isomorphica ; filamenta 2.8 

 mm; antherae thecae oblongae 1.1 X 0.3 mm, poro 0.1 mm diam., connectivo sub 

 loculis (ad filamenti insertionem) inconspicue (0.1 mm) producto, appendice 

 dorsali 0.6 mm longa hebetiacuta. Stylus 2.9 X 0.3-0.5 mm ; stigma 0.4 mm 

 latum, vix capitulatum ; ovarium 3-loculare, apise truncatum ; semina 0.5 X 

 0.3 mm. late pyramidata minute muriculata. 



Type: flowers pink, infrequent in moist shaded places at base of waterfalls 

 at head of Cario Yutaje. elev. 1900 m. Cerro Yutaje, Terr. Amazonas, Venezuela, 

 Feb 17-19, 1953. Bassetf Maguire & Cclia K. Maguire 35298 (XY). 



M. dnychioides has a leaf-blade length-width ratio of 2-2.3 (rather than 

 3-4.5). nnu-h larger petals, larger linear anthers, and dorsal connective ap- 

 pendage only 0.2-0.3 mm long. 



Salpinga paleacea Wurdack. sp. nov. Figure 13. 



A cong-eneribus differt petiolis venis foliorum subtus cum pilis paleaceis 

 grandibus armatis. 



Subherbacea simplicieaulis, caule subprostrato robusto ad 20 cm longo. ca. 

 1 cm crasso, ad nodos densissime paleaceo-setoso I setis ca. 10 mm longis, basi 

 1-1.5 mm latis) alioqui glabro. Petiolus 6-15 X 0.2-0.4 cm, modice paleaceo- 

 setosus et primum gracili-strigosus pilis gracilibus mox caducis; lamina 12-20 X 

 9-14 cm, late elliptica vel suborbicnlaris. apice rotundata vel brevissime abrup- 

 teque obtuso-apiculata, basi paulo cordata, 7-nervia nervis et nervulis supra 

 paulo insculptis subtus elevatis nervis secundariis 5-10 mm inter se distantibus. 

 margine dense setuloso-ciliata setulis subincurvis 2-3 mm longis, supra primum 

 dense villosula mox glabrata, subtus inter nervulos glabra ad nervos primarios 

 et senindarios modice appresso-setosa (setis longo-attenuatis ad 10 X 0.2 mm) 

 et ad nervos nervulosque gracili-strigulosa pilis laxis paulo caducis. Pedunculus 

 20-30 cm longus, ad nodum subbasilarem dense paleaceo-setosus alioqui primum 

 gracili-strigulosus demum glabratus. Flores 5-meri, in ramis umbellatis ad 

 pedunculum summum secundi ; rami divaricati basi modice paleaceo-setosi pri- 



